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bba96 快速开发框�?发布2.0 RC1

李李 — Tue, 07 Mar 2006 17:24:00 GMT

bba96 CHANGELOG
==========================
http://bba96.dev.java.net

Changes in version 2.0 alpha3 (2006.4.3)
*fix action query parameters bug -- [XXX:...]
*fix distinct bug (discard Criteria.DISTINCT_ROOT_ENTITY)
*some minor improvement

Changes in version 2.0 alpha2.2 (2006.3.16)
*update webwork's jar for fixing example bug in weblogic
*remove all contentType setting in example

Changes in version 2.0 alpha2.1 (2006.3.8)
*fix example bug
*update readme.txt

Changes in version 2.0 alpha1 (2006.3.7)
*webwork 2.2 support
*hibernate 3.x support, then support native sql
*fix some bug
*add aop security module
*add action query parameters validation
*enhance action query parameters management
*support more logic in action query
*support multi orderby property

Changes in version 1.0 (2005.09.23)
*release first

源码下蝲�Q�包含两个快速开发的例子。）
https://bba96.dev.java.net/servlets/ProjectDocumentList?folderID=4149&expandFolder=4149&folderID=0

��介参�?a href="/scorpio_leon/archive/2005/11/09/18878.aspx">http://www.aygfsteel.com/scorpio_leon/archive/2005/11/09/18878.aspx

李李 2006-03-08 01:24 发表评论

慎用Webwork的getText�Q��用不当效率可能会很低

李李 — Sat, 21 Jan 2006 05:26:00 GMT

很容易找到getText实际的操作类是LocalizedTextUtil�Q�方法public static String findText(Class aClass, String aTextName, Locale locale, String defaultMessage, Object[] args, OgnlValueStack valueStack)�Q?BR>
java doc 如下

Finds a localized text message for the given key, aTextName. Both the key and the message itself is evaluated as required. The following algorithm is used to find the requested message:

Look for message in aClass' class hierarchy.
1. Look for the message in a resource bundle for aClass
2. If not found, look for the message in a resource bundle for any implemented interface
3. If not found, traverse up the Class' hierarchy and repeat from the first sub-step
If not found and aClass is a ModelDriven Action, then look for message in the model's class hierarchy (repeat sub-steps listed above).
If not found, look for message in child property. This is determined by evaluating the message key as an OGNL expression. For example, if the key is user.address.state, then it will attempt to see if "user" can be resolved into an object. If so, repeat the entire process fromthe beginning with the object's class as aClass and "address.state" as the message key.
If not found, look for the message in aClass' package hierarchy.
If still not found, look for the message in the default resource bundles.
Return defaultMessage

主要��是查找resource bundle�Q�下面说明一�?BR>1. 先查找该class�Q�一般我们是在action调用�Q�就是该action对应的class了）对应的properties文�g�Q�找不到再去扑֯�应的接口�Q�找不到再去从该class的��承树上去重复前面的步骤�?BR>2. 如果是ModelDriver�Q�以上找不到再以model的class去重�?的步�?BR>3.�l�箋找，如果key是符合ognl表达式还以ognl表达式去解析�c�，如果能找到类�Q�还以以上的步骤��L��?BR>4. �q�找不到�Q�就从根据package以及package的��承树��L��Q�这�q�包括了该class的��承树所有的class的package树（�q�一步存在了太多的重复查扑ַ�作，因�ؓ很多package都是相同的）
5 使用默认的resource bundle

java.util.ResourceBundle虽然有cache�Q�但是ww��Z��减少调用getResourceBundle�Ҏ��Q�也�l�护了一个miss的hashset�Q�找不到的bundle name��׃��q�去�Q�那么每一�ơ查��N��同步了这个miss�Q�如果很多次查找�Q�开销也是很大的�?BR>
我就举一个例子，��p��W�四步查找package树好�?BR>

        // nothing still? alright, search the package hierarchy now
        for (Class clazz = aClass;
             (clazz != null) && !clazz.equals(Object.class);
             clazz = clazz.getSuperclass()) {

            String basePackageName = clazz.getName();
            while (basePackageName.lastIndexOf('.') != -1) {
                basePackageName = basePackageName.substring(0, basePackageName.lastIndexOf('.'));
                String packageName = basePackageName + ".package";
                msg = getMessage(packageName, locale, aTextName, valueStack, args);

                if (msg != null) {
                    return msg;
                }

                if (indexedTextName != null) {
                    msg = getMessage(packageName, locale, indexedTextName, valueStack, args);

                    if (msg != null) {
                        return msg;
                    }
                }
            }
        }

假设你的action�l�承树是�q�样
com.bba96.core.webwork.actions.DefaultActionSupport
com.xxxx.web.actions.XXXActionSupport
com.xxxx.web.user.actions.UserAction
com.xxxx.web.user.ViewUserAction
且不说ww没有判断是否是com.opensymphony.xwork.ActionSupport或者ww的接口就停止�Q�光是自��q��l�承树，��是4+3+3+3=13�ơ，再加上往上的�l�承树以及对应的接口�Q�com.opensymphony.xwork.ActionSupport以及Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable, ContinuableObject的接口，查找�ơ数��过30�ơ甚��x��多，�q�里的每一�ơ都有一个同步miss的过�E�，开销相当大�?BR>
如果你的key所在的resource bundle没有对应到合适的class或package�Ӟ��例如说放在了default bundle中，ww会浪费很多时间。这�U�情况下�Q�我在没有�ƈ发的时候测了一下，一�ơgetText大概耗时40ms左右

所以在实际应用我们应该避免�q�种情况出现�Q�要不让resource bundle一一对应class�Q�要不就自己实现一个简单的getText�Q�其实要是ww的ActionSupport的textProvider允许改变��最好了�?/P>

李李 2006-01-21 13:26 发表评论

XP SP2 装IIS

李李 — Wed, 21 Dec 2005 15:29:00 GMT

调试IIS+Tomcat�Q�装IIS的时候居然出现staxmem.dll不能复制�Q�google了一下，居然很多��要重装才能解冻I��晕，又找�?A >http://support.microsoft.com/?kbid=894351�Q�根据上面说的，我是属于method 2情况�Q�但是没有xp原盘�Q�装的时候就是sp2了，又倒…�?BR> 最后看到有人情况跟我的�c�M��Q�就是用method 1的第一�?esentutl /p %windir%\security\database\secedit.sdb ��可以了%windir%那里应该写你的xp安装路径�Q�不用管什么警告，��认��对了，IIS安装成功……开始配�|��?/FONT>

李李 2005-12-21 23:29 发表评论

Webwork2.2的一个改�q�，Validation/Workflow Interceptor增加excludeMethods�Ҏ��

李李 — Sat, 03 Dec 2005 14:29:00 GMT

一个例子，原来�?/P>

<interceptor-ref name="validation"/>
<interceptor-ref name="workflow"/>

可改写�ؓ

<interceptor-ref name="validation">
<param name="excludeMethods">input,back,cancelparam>
interceptor-ref>
<interceptor-ref name="workflow">
<param name="excludeMethods">input,back,cancelparam>
interceptor-ref>

那么�Q�对于简单的需验证��面�Q�不需要再因�ؓ避免不必要的校验而分两个action�?BR>
只有com.opensymphony.xwork.validator.ValidationInterceptor, com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor 定义�q�实��C��q�个excludeMethods�Q�实现的也还是比较粗�p�的�Q�我们在做类似实现的时候可以参考一下，有必要也可以改进�Q�扩展一下，例如增加includeMethods

    public void setExcludeMethods(String excludeMethods) {
        this.excludeMethods = TextParseUtil.commaDelimitedStringToSet(excludeMethods);
    }

    public String intercept(ActionInvocation invocation) throws Exception {
        if (excludeMethods.contains(invocation.getProxy().getMethod())) {
            log.debug("Skipping workflow. Method found in exclude list.");
            return invocation.invoke();
        }

    }

李李 2005-12-03 22:29 发表评论

BBA96 更新�?RC1

李李 — Fri, 18 Nov 2005 01:37:00 GMT

https://bba96.dev.java.net/servlets/ProjectDocumentList?folderID=4149&expandFolder=4149&folderID=0
修正一处batchRemove的bug�Q?BR>��action的与持久化相关的�Ҏ��Q�以及getResults�Ҏ��保护��h��
��d��了一个Book example. 包括��单用��L��理，书籍的查询与�U�借�?BR>Book Example 参见 http://book.bba96.com
Advanced Example 参见 http://www.gopherbook.com

李李 2005-11-18 09:37 发表评论

��Z��hibernate/spring的含RBAC权限模块的快速开发框�?目前与webwork整合)

李李 — Tue, 08 Nov 2005 16:51:00 GMT

https://bba96.dev.java.net/
源文件下�?br />https://bba96.dev.java.net/servlets/ProjectDocumentList?folderID=4149&expandFolder=4149&folderID=0

1. 核心持久层部分基于spring/hibernate�Q�实现强大灵�zȝ��动态query功能�Q�可独立使用�?br />2. 权限部分�Q�基于RBAC�Q�支持数据权限，依赖1部分的接口�?br />3. Action层，��Z��1以及webwork�Q�良好架构，减少大量代码�Q�支持view灉|��q�行query且有参数教验支持保证安全性�?br />
��单说bba96��是��Z��hibernate/spring的快速开发框�Ӟ��其中包含了对Hibernate Critiera�Q�Projection的封装，通过一个强大而灵�zȝ��QueryObject对象�Q�方便动态添加与删除条�g�?br />通过�l�一的query与数据库交互�Q�方便AOP�Q�其中的RBAC权限模块�Q�支持数据权限）��x��通过AOP操作QueryObject对象来实现的。bba96核心可以跟流行的view整合�Q�目前只有webwork整合的版本�?br />
bba96 不再需要自己写DAO/SERVICE�Q�借助��单的spring ioc卛_��配置使用�~�省DAO/SERVICE�Q�而且通过灉|��方便�Q�易扩展的后台持久层与webwork的整合，完全实现了快速开发的目的�?br />

Get Up And Running Quick

Example:
   (1) enter the example/simple or emample/book folder.
       NOTE:all following operation is under the folder you entered
   (2) copy your JDBC driver (default mysql) to the lib directory
       -- webapps\ROOT\WEB-INF\lib
   (3) edit hibernate.properties for database info (default mysql)
       -- src\main\java\hibernate.properties
   (4) run "ant"
   (5) create database via the sql script generated at database\schema-export.sql
   (6) edit applicationContext.xml for database info (default mysql) 
       -- webapps\ROOT\WEB-INF\applicationContext.xml (line 5 - 21)
   (7) start server and see this example


有��用上的讨论，误����p�L�� MSN: hotmail的帐号scorpio_leon

李李 2005-11-09 00:51 发表评论

开始尝�?Webwork 2.2, 一些容易出错的地方 -- 持箋更新

李李 — Wed, 19 Oct 2005 07:36:00 GMT

如果你用hibernate+spring�Q�注意spring的OpenSessionInView的Filter要在webwork的Filter之前
ww:property�q�个tag�~�省是escape html的，在tag可以指定escape="false"避免html字符转义
一些原来用单引可��C�字�W�串的都要去掉单引号�Q�例�?" 'test' " 要改�?"test"
No object in the CompoundRoot has a property named�Q�这是由于在webwork.properties讄��了webwork.devMode=true�Q�会��查页面上传递过来的参数是否在action定义�q��?/LI>

李李 2005-10-19 15:36 发表评论

Webwork 2.1.7 的一个小�~�陷

李李 — Tue, 18 Oct 2005 10:22:00 GMT

public interface ModelDriven {
Object getModel();
}

而我需要的�?

public interface ModelDriven {
Object getModel() throws Exception;
}

因�ؓ要拦截可能抛出的异常�Q�流�E�是�q�样service - my service interceptor - action - xwork interceptor
现在断在action�q�里了，很奇怪，webwork其他�Ҏ��都有throw exception�Q�独独这个没有，��N��又要hack webwork�Q?BR>恩，有了AOP后，接口设计应该要多考虑一下，是否允许抛出异常…�?/P>

李李 2005-10-18 18:22 发表评论

��单实现异步Email -- Jakarta Common Email �l�合 Opensymphony Quartz

李李 — Sat, 15 Oct 2005 14:01:00 GMT

看看下面的应用例子，�E�序执行三秒后会在后台开始发Email�Q�只有几行程序，很简单吧�?BR>本来��应该这么简单，�q�能再省么，呵呵�Q�谢谢开源的力量…�?BR>

    SimpleEmail email = new SimpleEmail();
    email.addTo("receiver@somemail.com", "Receier's Name");
    email.setSubject("Email from www.bba96.com");
    email.setMsg("Hello, guy!");
    EmailScheduler emailScheduler = new EmailScheduler();
    emailScheduler.process(email);

�q�里用到�?A >jakarta common email中的SimpleEmail
EmailScheduler是一个利�?A >Opensymphony Quartz做简单的调度�Q�其中EmailJob实现了Quartz的Job接口
以下是EmailScheduler以及EmailJob源代码�?/P>

package com.bba96.scheduler;

import java.util.Date;

import javax.mail.Authenticator;

import org.apache.commons.mail.Email;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;

public class EmailScheduler {

    public void process(Email email, Authenticator authenticator)
            throws SchedulerException {
        // TODO if can be optimized with static instance.
        SchedulerFactory schedFact = new org.quartz.impl.StdSchedulerFactory();
        Scheduler sched = schedFact.getScheduler();
        sched.start();

        JobDetail jobDetail = new JobDetail("EmailJob", null, EmailJob.class);
        jobDetail.getJobDataMap().put(EmailJob.EMAIL, email);
        jobDetail.getJobDataMap().put(EmailJob.AUTHENTICATIOR, authenticator);
        //Create a trigger that fires exactly once, three seconds from now
        long startTime = System.currentTimeMillis() + 3000L;
        SimpleTrigger trigger = new SimpleTrigger("emailTrigger", null,
                new Date(startTime), null, 0, 0L);
        sched.scheduleJob(jobDetail, trigger);
    }

    public void process(Email email) throws SchedulerException {
        process(email, null);
    }

}

package com.bba96.scheduler;

import javax.mail.Authenticator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class EmailJob implements Job {

    protected final Log logger = LogFactory.getLog(EmailJob.class);

    public static String EMAIL = "EMAIL";

    public static String AUTHENTICATIOR = "AUTHENTICATIOR";

    public static String DEFAULT_HOST = "your smtp mail server";

    public static int DEFAULT_SMTP_PORT = 25;

    public static String DEFAULT_USER = "yourmail@yourserver.com";

    public static String DEFAULT_PASSWORD = "your password";

    public static String DEFAULT_FROM_ADDRESS = "yourmail@yourserver.com";

    public static String DEFAULT_FROM_NAME = "Your Name";

    public void execute(JobExecutionContext context)
            throws JobExecutionException {
        Email email = (Email) context.getJobDetail().getJobDataMap().get(EMAIL);
        if (email != null) {
            Authenticator authenticator = (Authenticator) context
                    .getJobDetail().getJobDataMap().get(AUTHENTICATIOR);
            if (email.getHostName() == null) {
                email.setHostName(DEFAULT_HOST);
            }
            if (email.getSmtpPort() == null) {
                email.setSmtpPort(DEFAULT_SMTP_PORT);
            }
            if (authenticator == null) {
                authenticator = new DefaultAuthenticator(DEFAULT_USER,
                        DEFAULT_PASSWORD);
                email.setAuthenticator(authenticator);
            }
            if (email.getFromAddress() == null) {
                try {
                    email.setFrom(DEFAULT_FROM_ADDRESS, DEFAULT_FROM_NAME);
                } catch (EmailException e) {
                    logger.error("Email address invalid", e);
                    return;
                }
            }
            try {
                email.send();
            } catch (EmailException e) {
                logger.error("Email send error", e);
            }
        }
    }

}

李李 2005-10-15 22:01 发表评论